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प्रश्न
Select the appropriate option for the following statement:
The element which is noble gas and radioactive in nature.
पर्याय
Boron
Chlorine
Potassium
Platinum
Radon
उत्तर
Radon.
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संबंधित प्रश्न
Give an example of a metal which can be easily cut with a knife.
Some properties are listed in the following Table. Distinguish between metals and non-metals on the basis of these properties
| Properties | Metals | Non-metals |
| 1. Appearance | Lustrous | Dull |
| 2. Hardness | Hard | Soft |
| 3. Malleability | Can be beaten into thin sheets | Cannot be beaten into thin sheets |
| 4. Ductility | Can be drawn into wires | Cannot be drawn into wires |
| 5. Heat Conduction | Good conductors of heat | Poor conductors of heat |
| 6. Conduction of Electricity | Good conductors of electricity | Poor conductors of electricity |
Name the non-metal which is used as a rocket fuel (in liquid form).
Name one property which is characteristic of metals.
State one use of Nitrogen.
State any five physical properties of metals.
Fill in the blank
A chemical compound that makes up the striking heads of match sticks is ______
Fill in the blank
A chemical compound that makes up the striking heads of match sticks is .........................
Write ‘True’ or ‘False’ in front of following statement.
Graphite is used in making filaments of electric bulb.
Tick (√) the most appropriate answer.
Sodium amalgam is prepared by dissolving sodium in :
State any five physical properties of a metal.
Physical properties of a metal :
State two important uses of following non-metals
Uses of nitrogen
Name:
a metal which can float on water
Name:
a metal which lacks ductility
Complete the table.
| Property of metal | Use in everyday life |
| i. Ductility | |
| ii. Malleability | |
| iii. Conduction of heat | |
| iv. Conduction of electricity | |
| v. Sonority |
Which metal occurs as a sulphide also gives the name of their respective ore.
A metallic oxide which cannot be reduced by normal reducing agents:
With reference to the physical properties of metals and non-metals, state the following exception.
a non-metal which sublimes and is non-lustrous
Find the odd one out and give its explanation.
The non – metal which is liquid at room temperature is ______.
